Clamp.



E. GOBLE.

' CLAMP.

APPLIOATION FILED SEPT. 12, 1911.

' Patented Jan. 16, 1912.

2 SHEETS-SHEET 1.

il H jllorhh ole.

@Masoniattorney.

E. GOBLE.

CLAMP.

APPLICATION-FILED SEPT. 12. 1911.

' Patented Jan. 16, 1912.

2 SHEETS-SHEET 2.

ELLSWORTH GOBLE, 0F LOUISVILLE, KENTUCKY.

CLAMP.

Specification of Letters Patent.

Patented Jan. 16, 1912.

Application filed September 12, 1911. Serial No. 648,880.

To all whom t may concern Be it known that I, ELLswoRTH GoBLE, a citizenof the United States, residing at Louisville, in the county of Jeffersonand State of Kentucky, have invented new and useful Improvements inClamps, of which the following is a specification.

An object of the invention is to provide a clamp, particularly adaptablefor use in miter work, for mitering the struts of window casings and thelike.

Among other features myinvention embodies a plurality of bases providedwith uprights through which a serrated bar is slidably passed, a dog forlocking engagement at one end of the bar and adapted to abut against oneof the ends of the said bases, clamping members mounted on the bases andadapted to clampingly receive therebetween the bases which it is desiredto miter, means for moving one of the said bases toward the other andmeans for permitting an adjustment of the clampingvmembers.

Reference is to be had to the accom'pfn'iying drawings constituting apart of this specification, in which similar charactersI of referencedenote corresponding parts in all the views `and in which- Figure 1 is aperspective view of my device, the dotted lines denoting a pair ofstruts arranged on myvdevice and adapted to be mitered together. Fig. 2is a vertical longitudinal sectional view taken on the line 2-2 inFig. 1. Fig. 3 is a vertical longitudinal sectional view through one ofthe bases. Fig. 4 is a bottom plan view of one of the locking plates.Fig. 5 is a fragmentary plan view of one of the bases, one of thelocking plates being shown in dotted lines in one of its positionsthereon. Fig. 6 is a similar fragmentary plan view of one of the bases,with the locking plate shown in another position thereon.

Referring more particularly to the views, I provide bases 10, 11 towhich are secured uprights 12 provided with apertures 13 through which abar 14 is slidably extended, one end of the bar 14 being secured in abearing block 15 dependingly arranged relatively to the bar and having ascrew 16 threadedly passed therethrough, a handled crank 17 beingconnected with thc said screw for the purpose of turning the same sothat the free end of the screw will be received in an indentation 18 inone side of the base 10.

Pivotally mounted on the bases 10, 11 are clamping members 19 andmounted to slide in grooves 20 in the bases 10,11 are adjusting plates21 provided with slots 22, through which pins 23 are extended, clampingmembers 24, similar to the clamping members 19, being pivotally mountedon the adjusting plates 21. Secured to one side of each ,of the clampingmembers 19 and 24 are strips of sandpaper 25 for rigidly holdingmaterial between the respective clamping members 19 and 24 on each ofthe bases 10, 11 as shown in Fig. 1.

Extending upwardly from the bases 10, 11 are threaded pins 26 providedwith thumb screws 27 and mounted on the pins 26 are locking plates 28,one side of each of the locking plates being adapted to abut against oneof the clamping members 24 of each of the bases 10, 11 to limit thesliding movement of the adjusting plates 21. Tracks 29 are formed on thebases 10, 11 and the locking plates 28 are each provided with grooves30, 31, the said grooves being adapted to receive the tracks 29 toretain the locking plates in rigid position on the bases 10, 11. Byreferring to Fig. 1, it will be seen that the groove 30 on each lockingplate 28 receives the track 29 on each base 10, 11 thus permitting onlya certain size piece of material being inserted between the clampingmembers 19 and 24 on the bases 10, 1l. When it is desired to move theVadjusting plates 21, so that larger pieces of material can beaccommodated between the clamping members 19 and 24 on each of the bases10, 11, the locking plate on each base is rst removed therefrom byremoving the thumb screws 27 and then by turning each of the saidplates, the groove 31 of each plate will receivey the 'track 29 on therespective bases, thus permitting of sliding the adjusting plates 21, soas to provide a greater space between the clamping members 19 and 24 oneach base, the mentioned locking plates 28 being eccentrically mountedon the bases 10, 11 and having angular sides to accomplish this result.

In the practical use of my device, the pieces to be mitered are mountedbetween the clamping members 19 and 24 on each of the bases 10, 11 withthe ends of the pieces that are to be mitered abutting, a dog 32 beingmounted to slide on the bar 14 and having a tooth 33 thereof received ina serration 34 in the base 11 with the upper end of the dog providedwith a lug 35 adapted to repose in serrations 36 on the bar 14, thuslimiting the outward sliding movement of the base 11 relatively to thebar 14, the dog 32 being held in rigid position on the bar by the lug 35reposing in one of the serrations 36 with an extension 37 ot the dogabutting against the under side of the bar 14, a pin 38 being providedon the bar to prevent the dog 32 from becoming disengaged from the bar.The crank 17 is now turned by means of a handle thereon, thus operatingthe screw 16 so that the tree end thereof will be received in theindentation 18 on the base 10 and consequently the base 10 will be movedtoward the base 11, thus retaining the ends of the materials which areto be mitered in abutting posit-ion, it being understood that thementioned ends are preferably glued previous to their insertion betweenthe clamping members 19 and 24. Thus when the glue on the pieces ofmaterial becomes dry, the said pieces of material will be securely ymitered together and can be taken from the clamp by simply unscrewingthe screw 16 from the base 10, thus permitting of sliding the baserelatively to the bar 14.

From the foregoing description, it will be seen that a reliable andetlicient clamp is produced and although I have described the clampingmembers 19 and 24A as provided with sandpaper 25, it will be understoodthat the clamping members can be serrated or roughened to accomplish thesame purpose as the sandpaper.

Having thus fully described the invention, what I claim as new, is

1. A clamp comprising a plurality of bases, uprights secured to the saidbases, a bar slidably extended through the said uprights, clampingmembers pivotally mounted on the said bases, adjusting plates mounted toslide on the said bases, clamping members mounted to swing on the saidadjusting plates, means for locking the said adjusting plates,serrations formed on the said bar, a locking dog mounted on the serratedend of the said bar and adapted for locking engagement with one of thesaid bases and a screw having connection With the said bar and adaptedfor engagement with the `other base to move the said other baserelatively to the said bar.

2. A clamp comprising a plurality of bases, uprights secured to the saidbases, a bar mounted to slide on the said uprights, clamping membersmounted on the said bases and adapted to receive connectible pieces ofmaterial therebetween means for moving one of the said bases toward theother said base and means for retaining the said other base in rigidposition relatively to the said baru 3. A clamp comprising a pluralityof bascs.l uprights secured to the said bases, a bar mounted to slide onthe said uprights, a dog mounted on the said bar and adapted for lockingengagement with one of the said bases, means for sliding the other saidbase relatively to the said bar and clamping means for releasablyretaining pieces of material in clalnping engagement with the saidbases.

4. In a clamp the combination of a base, a second base, uprightsextended from the said bases, a bar slidably mounted on the saiduprights, clamping members on t-he said bases and adapted to clamppieces of material thereto, means for locking the second mentioned baserelatively to the said bar and a screw having connection with the saidbar and adapted to engage the first mentioned base to move the samerelatively to the second mentioned base.

5. In a clamp the combination of a base, a second base, uprightsextended from the said bases, a bar mounted to slide on the saiduprights, means for locking the firstmentioned base relatively to thesaid bar, means for moving the first mentioned base on the said bar,clamping members pivotally mounted on the said bases, adjusting platesmounted to slide on the said bases and clamping members pivotallymounted on the said adjusting plates.

In testimony whereof I aiiix my signature in presence of two witnesses.

ELLSVVORTH GOBLE. Vitnesses JOHN D. CLAUSEN, PETER ROSENBERGER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

